Is it possible for a guy to suck his own Penis?

I am a 21 year boy. I have a curiosity here to know after reading in an article on internet. It is about self-suck of penis, it says that a guy can suck his own penis.

My question is is it true? How is it possible? Has anyone tried it out? Please reply, I am curious to know in details. If anyone has tried then please share your experience how you did it, elaboratoly.

ofcourse its possible.....
but u need to try......a lot
yoga makes it possible i think......i saw a vedio of it also
i tried once and able to put my dick head in my mouth and cant go further......if u try u can acheive it for sure

It is possible, Marilyn Manson can do it ,, but to do it he underwent a series of surgery wherein his floating ribs were removed and his kidneys were moved up so that he could bend easy enough for his dick to reach his mouth.

For some, yes this is possible, you have to have that flexibility. What you see on porno or internet, you dont have to follow everything, you may end up wounding yourself.
I had clips of a guy giving a suck to himself, and I had a clip of a guy fucking his own ass. Doesnot mean people should try all these.
Rather than going through all the pain to achieve a blowjob and sucking a dick, isn't it easier to get a guy friend and get onto 69?